111 lines
3.2 KiB
C++
111 lines
3.2 KiB
C++
// Copyright (c) 2012-2013 The Cryptonote developers
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// Distributed under the MIT/X11 software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#pragma once
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#include <boost/variant/variant.hpp>
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#include <boost/variant/apply_visitor.hpp>
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#include <boost/variant/static_visitor.hpp>
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#include <boost/mpl/empty.hpp>
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#include <boost/mpl/if.hpp>
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#include <boost/mpl/front.hpp>
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#include <boost/mpl/pop_front.hpp>
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#include "serialization.h"
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template <class Archive, class T>
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struct variant_serialization_traits
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{
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};
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template <class Archive, class Variant, class TBegin, class TEnd>
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struct variant_reader
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{
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typedef typename Archive::variant_tag_type variant_tag_type;
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typedef typename boost::mpl::next<TBegin>::type TNext;
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typedef typename boost::mpl::deref<TBegin>::type current_type;
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static inline bool read(Archive &ar, Variant &v, variant_tag_type t)
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{
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if (variant_serialization_traits<Archive, current_type>::get_tag() == t) {
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current_type x;
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if(!::do_serialize(ar, x))
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{
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ar.stream().setstate(std::ios::failbit);
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return false;
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}
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v = x;
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} else {
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return variant_reader<Archive, Variant, TNext, TEnd>::read(ar, v, t);
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}
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return true;
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}
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};
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template <class Archive, class Variant, class TBegin>
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struct variant_reader<Archive, Variant, TBegin, TBegin>
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{
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typedef typename Archive::variant_tag_type variant_tag_type;
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static inline bool read(Archive &ar, Variant &v, variant_tag_type t)
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{
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ar.stream().setstate(std::ios::failbit);
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return false;
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}
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};
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template <template <bool> class Archive, BOOST_VARIANT_ENUM_PARAMS(typename T)>
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struct serializer<Archive<false>, boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)>>
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{
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typedef boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)> variant_type;
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typedef typename Archive<false>::variant_tag_type variant_tag_type;
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typedef typename variant_type::types types;
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static bool serialize(Archive<false> &ar, variant_type &v) {
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variant_tag_type t;
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ar.begin_variant();
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ar.read_variant_tag(t);
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if(!variant_reader<Archive<false>, variant_type, typename boost::mpl::begin<types>::type, typename boost::mpl::end<types>::type>::read(ar, v, t))
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{
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ar.stream().setstate(std::ios::failbit);
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return false;
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}
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ar.end_variant();
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return true;
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}
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};
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template <template <bool> class Archive, BOOST_VARIANT_ENUM_PARAMS(typename T)>
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struct serializer<Archive<true>, boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)>>
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{
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typedef boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)> variant_type;
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//typedef typename Archive<true>::variant_tag_type variant_tag_type;
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struct visitor : public boost::static_visitor<bool>
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{
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Archive<true> &ar;
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visitor(Archive<true> &a) : ar(a) { }
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template <class T>
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bool operator ()(T &rv) const
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{
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ar.begin_variant();
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ar.write_variant_tag(variant_serialization_traits<Archive<true>, T>::get_tag());
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if(!::do_serialize(ar, rv))
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{
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ar.stream().setstate(std::ios::failbit);
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return false;
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}
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ar.end_variant();
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return true;
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}
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};
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static bool serialize(Archive<true> &ar, variant_type &v) {
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return boost::apply_visitor(visitor(ar), v);
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}
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};
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